Choker hook



O. A. WIRKKALA CHOKER HOOK Aug. 7, 11923. 3,4641%62 Filed July 27. 1922Bfilmoefidm,

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Application filed July 27, 1922. Serial No. 577,9fid6.

To all whomit may concern:

, Be it known that ll, 080m: A. WIIRKKALA, a citizen of the UnitedStates, and resident of Kent, in the county of King and State of Washinton, have invented a new and useful Cho er Hook, of which the followingis a specification.

This invention relates to improvements in choker hooks-used by loggersfor an attachmerit to cables whereby is formed a noose for engagementwith logs, and one of the objects of my improvements is to provide ahook easily engageable and disengageable with the cable by using a smallamount of slack in said cable, another object of my improvements is toprovide a. long curved hole through which the choker cable may rive tocause variations in the size of the cable noose and said hole beingshaped to cause the cable to bend in easy curves about the hook whenunder strain, another object of my improvements is to provide a hookproperly designed for casting in steel alloy in order that asufiiciently strong hook may be cheaply furnished which is light andconvenient to handie, and another object of my improvements is toprovide a hook which will, under the conditions of its use, aii 'ord adependable fastening for the noose.

, l attain these objects with the device illustrated in the accompanyingsheet of drawings. forming a part of this specification, in which Figurel is a front elevation of my preferred form oi hook, 2 is a sideelevation of Fig. 1 in section on a medial vertical plane, Fig. 3 is abottom plan view of Fig. 2, Fig. 4 is a front elevation of an optionalform of the hook, Fig. 5 is a bottom plan view of Fig. 4, Fig. 6 is anend elevation of another optional form of my choker hook, Fig. 7 is afront elevation of Fig. 6, and Fig. 8 is a bottom plan view of Fig. 6.

Similar characters refer to similar parts throughout the several viewsof the optional as well as the'preferred form. Certain parts are brokenaway to show other parts hidden thereby.

More particularly: The main hook shank or body is shown at 9, andconsists of metal parts adapted and shaped to resist tension strains.The slipnoose hole or cable reeveway is shown at 10. For the purposes ofthis specification said hole is considered to be through the upper endof the hook, the upper part of the housing forming this hole ispreferably convex longitudinally to provide an easy bearing surface forthe cable when under strain. A chamber 11 is formed within shank 9 largeenough to receive the cable knob. Two jaws a", a at the lower end of thehook are separated by slot 12, the closed end of which is preferablysemicircular and concentric with the longitudinal medial line of thehook. 'Slot 12 is wide enough to easily permit the entry of the cabletherein. Bosses 13, 13 project from each of jaws a upward and, togetherwith the bottom of chamber 11 they form a socket large enough to receivethe cable knob. In Figs. 1-3 the choker cable is shown at 14 in twosections, the major portion thereof being broken away. The right-handend of this cable, not shown, is engageable with a bull hook, not shownand from thence enters the right side of the hook in hole 10, passingthrough which it encircles a log, not shown, and enters the lower end ofthe hook in slot 12. This end of the cable has fixed thereon knob 15,and is engageable with the hook when said knob is placed in the positionshown in dotted lines at 15 and carried backward into fchamber 11 tillthe cable comes in contact with the closed end of slot 12, by which timesaid knob is to the rear of bosses 1 3 and, when carried downward,enters the socket at the bottom of said chamber and is engaged with thehook, and seated on jaws a", a

1%. strain on said bull hook causes cable 14 to pass toward the rightthrough hole and reduces the dimensions of said noose till it tightlyembraces the log when the choker cable is properly engaged with the logfor transporting the The normal strain of operation causes said noose tobecome so intimately engaged with the log that, when said strain isslackened, the noose is usually maintained in snug relation with the logbecause of the frictional engagement of the cable with the log and inhole 10 of the hook. Thus knob is firmly held in place in the hooksocket even after slack is provided in the choker line, in practice thisstyle of choker hook is found to serve its purpose very well, althoughthe height of bosses 13 is not large.

To disengage the hook, slack is provided in cable 14% and said cable ispassed by hand toward the left through hole 10 till sufficomplicated forforging, this new casting metal, together with the electric furnace inwhich it is melted, make these light, strong.

and safety hooks suitable for the heaviest work.

The preferred form of hook shown in Figs. 1-3 provides a side entrancefor the knob; that is, slot 12 is transverse of hole 10. While in thehooks shown in Figs. 4-5 and 6-8 said slots and holes are parallel, andthe construction followed for the hook illustrated in Figs. 68 providesopenings in all four sides which makes the hook lighter and furnishesadditional hand holds.

aving thus disclosed my invention, what I claim is new and desire tosecure by Letters Patent is,-

1. In a choker hook in combination, a hook body having a cable reevewaythrough its upper end and a chamber in its middle part, two Jaws at thelower end of said body with a slot between entering the bottom of saidchamber, and a boss projecting upward from each of said jaws adapted toform a socket ofthe bottom of said chamber, whereby a cable having aknob on one end is reeveable in said reeveway and enterable in said slotand said knob is enterable through said chamber into the socket thereofbehind said bosses to bear on said ]8.WS. I

2. In combination, a choker hook having a cable reeveway and a chamberenterable by a cable knob also having a slot opening in its bottom, twobosses on said hook one on each side of said slot adapted to form asocket of the bottom of said chamber, a cable reevable in said reevewayand enterable in said slot, and a knob fixed on one end of said cableadapted to engage in said socket and bear on the bottom thereof behindsaid bosses when said cable is in said slot.

OSCAR A. WTIRKKALA.

